We moved from North Central MT to White Plains MD and brought our 18 year old gelding with us. We arrived in mid-September and our horse came down with a pretty good case of rain rot that would not go away. We contacted our MT vet and he felt that extra nutrients might be helpful. We started our horse on ShoGlow and after a few weeks we started to see a difference. It took a total of about 5-6 weeks before the rain rot was completly gone, but we feel that it did the job. We have kept our horse on the product and knock on wood he has not had any more issues with rain rot, even with all of the rain we are getting. We looked at a lot of products, but this one was the first one we tried and in our book we think that it did the trick.